Unearthing “Dirty Little Secrets” Hidden in ESD Protection Device Specs

 

When left unprotected, all electronic devices are susceptible to damage from ESD and other overvoltage events. Extending the life of these devices demands selecting appropriate protection devices and locating them correctly.The main purpose of an ESD protection device is to provide the lowest resistance shunt path to ground during an overvoltage event or transient. New circuit designers too often make the mistake of placing the device wherever it fits on the board on the bus or data line to be protected, rather than organizing the board layout to allow device placement near the port that’s subject to ESD or electrical overstress condition. The device should be as close to the connector or button/switch being protected as possible to ensure the transient is clamped as soon as it enters the circuit. In addition, it should be installed as near as possible to the data/signal line to eliminate the potential for an inductive overshoot that would result in a voltage spike that could damage the circuitry…Read More

 

Electronics Protection Magazine Chad June 2014

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